{"id":10917,"date":"2024-08-08T18:11:30","date_gmt":"2024-08-08T15:11:30","guid":{"rendered":"https:\/\/vasexperts.com\/?p=10917"},"modified":"2025-08-13T14:05:19","modified_gmt":"2025-08-13T11:05:19","slug":"ssg-as-a-border-router-arp-management","status":"publish","type":"post","link":"https:\/\/vasexperts.com\/fr\/blog\/functionality\/ssg-as-a-border-router-arp-management\/","title":{"rendered":"SSG en tant que routeur frontalier. Gestion ARP"},"content":{"rendered":"<h2>Routage dans SSG<\/h2>\r\nLe routage dans SSG est r\u00e9alis\u00e9 par l\u2019\u00e9change de routes entre SSG et Soft-Router \u00e0 l\u2019aide de la table de route du noyau Linux. Vous pouvez en apprendre davantage \u00e0 ce sujet dans <a rel=\"nofollow\" href=\"https:\/\/wiki.vasexperts.com\/doku.php?id=dpi:dpi_components:router:start\">notre base de connaissances<\/a>.\r\n\r\nLes principales caract\u00e9ristiques de SSG en tant que routeur sont les suivantes :\r\n<ul>\r\n \t<li>Support des protocoles de routage BGP et OSPF.<\/li>\r\n \t<li>Mise en \u0153uvre de VRF Lite o\u00f9 le SSG partage les tables de routage mais ne cr\u00e9e pas de tunnels uniques pour le trafic de chaque VRF (par exemple, MPLS, VXLAN). VRF Lite permet d\u2019isoler les services fournis et d\u2019optimiser le routage lors de l\u2019utilisation de liens diff\u00e9rents.<\/li>\r\n<li>Prend en charge Equal Cost Multi-Path (ECMP) et Link Aggregation Group (LAG).<\/li>\r\n<\/ul>\r\nAvec la version 13.1, le SSG peut \u00eatre utilis\u00e9 comme routeur frontalier.\r\n\r\n<h2>Optimisation du routage dans le SSG avec le gestionnaire ARP<\/h2>\r\nConsid\u00e9rons un sch\u00e9ma typique de la construction du r\u00e9seau d\u2019un op\u00e9rateur de t\u00e9l\u00e9communications, o\u00f9 le SSG agit en tant que DPI\/NAT\/BRAS\/Routeur frontalier. Le SSG termine le segment L2 de l\u2019abonn\u00e9 pour les connexions IPoE\/PPPPoE du c\u00f4t\u00e9 des interfaces d\u2019entr\u00e9e. Les interfaces de sortie sont incluses dans le commutateur auquel la liaison montante et les routeurs internes sont connect\u00e9s.\r\n\r\n   [important]   Comme le SSG ne commute pas en interne entre les paires d\u2019interfaces physiques, les connexions \u00e0 plusieurs routeurs doivent \u00eatre effectu\u00e9es via le commutateur.    [\/important]  \r\n\r\n<a href=\"\/wp-content\/uploads\/2024\/08\/arp_mng.png\" data-fancybox=\"\"><noscript><img decoding=\"async\" class=\"size-full wp-image-\" title=\"\" src=\"\/wp-content\/uploads\/2024\/08\/arp_mng.png\" alt=\"ARP Management\" width=\"\"><\/noscript><img decoding=\"async\" class=\"size-full wp-image- lazyload\" title=\"\" src=\"\/wp-content\/uploads\/2024\/08\/arp_mng.png\" alt=\"ARP Management\" width=\"\" data-src=\"\/wp-content\/uploads\/2024\/08\/arp_mng.png\"><\/a>\r\n\r\nDans ce sch\u00e9ma, le SSG re\u00e7oit la vue compl\u00e8te BGP de l\u2019op\u00e9rateur en amont (routeur BGP) et est connect\u00e9 via OSPF au routeur (routeur OSPF), derri\u00e8re lequel les services locaux de l\u2019op\u00e9rateur t\u00e9l\u00e9com sont situ\u00e9s.\r\n\r\n   [important]  Il convient de noter que le SSG stocke la table de routage dans la m\u00e9moire vive, qui peut \u00eatre facilement \u00e9tendue. Si n\u00e9cessaire, il peut recevoir et traiter plusieurs vues compl\u00e8tes BGP. Cette capacit\u00e9 est activement utilis\u00e9e par les fournisseurs car ils n\u2019ont pas pu l\u2019impl\u00e9menter sur d\u2019autres routeurs.   [\/important]  \r\n\r\nUne caract\u00e9ristique de ce sch\u00e9ma est que le routeur BGP n\u2019annonce pas lui-m\u00eame comme nexthop, mais d\u2019autres routeurs tels que le routeur 1 ou le routeur 2. De cette mani\u00e8re, le fournisseur en amont met en \u0153uvre la redondance des canaux de liaison montante et centralise en outre la gestion de l\u2019annonce des routes pour le fournisseur en aval.\r\n\r\nAvant la version 13.1, le SSG ne pouvait pas envoyer de mani\u00e8re ind\u00e9pendante une requ\u00eate ARP pour obtenir les adresses MAC du Routeur 1 et du Routeur 2, ce qui l\u2019emp\u00eachait de former un paquet vers le nexthop. Auparavant, le SSG remplissait sa table ARP en analysant les requ\u00eates ARP provenant de l\u2019espace de noms du r\u00e9seau et les r\u00e9ponses \u00e0 ces requ\u00eates. Cependant, dans ce sc\u00e9nario, la pile r\u00e9seau Linux ne g\u00e9n\u00e8re pas de requ\u00eates ARP vers le routeur 1 et le routeur 2, car ce n\u2019est pas n\u00e9cessaire. Pour r\u00e9soudre ce probl\u00e8me, un gestionnaire ARP a \u00e9t\u00e9 ajout\u00e9 \u00e0 SSG. D\u00e9sormais, le SSG peut g\u00e9n\u00e9rer des requ\u00eates ARP vers les adresses IP n\u00e9cessaires. Lors de la g\u00e9n\u00e9ration d\u2019une requ\u00eate ARP, SSG utilise l\u2019adresse sp\u00e9cifi\u00e9e dans le param\u00e8tre <span>   <strong>   bras_arp_ip    <\/strong>   <\/span>comme le    <strong>   src IP    <\/strong>   .\r\n\r\nVous pouvez en savoir plus sur le gestionnaire ARP dans <a rel=\"nofollow\" href=\"https:\/\/wiki.vasexperts.com\/doku.php?id=dpi:dpi_components:router:start\">notre base de connaissances.<\/a>\r\n<h2>Conclusion<\/h2>\r\nNous continuerons \u00e0 travailler sur l\u2019am\u00e9lioration du gestionnaire ARP. Dans un avenir proche, nous pr\u00e9voyons d\u2019ajouter la possibilit\u00e9 de g\u00e9n\u00e9rer des requ\u00eates ARP avec diff\u00e9rentes adresses IP sources, en plus de l\u2019adresse sp\u00e9cifi\u00e9e dans le    <strong>   bras_arp_ip   <\/strong>    param\u00e8tre. Cela permet d\u2019\u00e9tablir plusieurs sessions BGP avec diff\u00e9rents fournisseurs.","protected":false},"excerpt":{"rendered":"<p>Par d\u00e9faut, le SSG fonctionne comme un pont L2, mais depuis 2017, il a \u00e9t\u00e9 d\u00e9velopp\u00e9 comme un BRAS\/BNG \u00e0 part enti\u00e8re. La fonctionnalit\u00e9 de routage est particuli\u00e8rement importante pour une passerelle de services, car elle est n\u00e9cessaire pour communiquer avec les r\u00e9seaux externes, fournir un acc\u00e8s aux ressources internes et am\u00e9liorer la r\u00e9silience. L&rsquo;\u00e9quipe d&rsquo;experts SVA a donn\u00e9 l&rsquo;occasion d&rsquo;int\u00e9grer dans SSG des solutions \u00e9prouv\u00e9es dans le r\u00f4le de routeur logiciel, telles que BIRD, FRRouting et QUAGGA.<\/p>\n","protected":false},"author":24,"featured_media":10920,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55],"tags":[],"class_list":["post-10917","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-functionality"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>(English) VASExperts<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/vasexperts.com\/blog\/functionality\/ssg-as-a-border-router-arp-management\/\",\"url\":\"https:\/\/vasexperts.com\/blog\/functionality\/ssg-as-a-border-router-arp-management\/\",\"name\":\"[:en]SSG as a Border Router. 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